Finding the Third Proportional to 136,314 and 209,236.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,314 : 209,236.50 = 209,236.50 : x
2. Step 2: Convert to fraction form
   136,314/209,236.50 = 209,236.50/x
3. Step 3: Cross multiply
   136,314x = 209,236.50 × 209,236.50
4. Step 4: Simplify right side
   136,314x = 43,779,912,932.25
5. Step 5: Solve for x
   x = 43,779,912,932.25/136,314
6. Step 6: Final answer
   x = 321,169.60